Trading Risk Management: The Complete 1% Rule & Position Sizing Guide
Risk management in trading is the systematic process of identifying, measuring, and limiting the amount of capital at risk on each trade and across the entire trading portfolio. The most widely used rule is risking no more than 1% of total account equity per trade.
Key Takeaways
- The 1% Risk Rule limits maximum loss on any single trade to 1% of total account equity.
- Position size = Risk Amount ÷ (Entry Price – Stop Loss Price).
- A minimum Risk-to-Reward Ratio of 1:2 is required for positive expectancy trading.
- Drawdown control: After losing 5% of total equity, reduce position sizes by 50% until recovered.
Why Risk Management is More Important Than Your Strategy
A trader with a 50% win rate and 1:2 Risk-to-Reward ratio will be profitable over a large sample of trades. A trader with a 70% win rate but no risk management can still blow up their account with a few large losing trades.
The Position Size Formula
Position Size = (Account Balance × Risk %) ÷ (Entry Price – Stop Loss Price)
Risk-to-Reward Ratio Explained
The Risk-to-Reward (R:R) ratio compares your potential loss to your potential profit. A 1:2 R:R means risking $100 to potentially profit $200. Always ensure your target is at least 2x your stop loss distance before entering any trade.
Recommended Next Step
Put this learning into practice using our Position Size Calculator.